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Boston Cut-off Time Prediction Contest

Predict the 2027 Boston Cut-off Time and win a great prize and bragging rights among all your running friends.

Submit Your Prediction

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Historical weather

Historical Race Day Weather for the Jack and Jills Downhill Marathon

See historical race day weather for the Jack and Jills Downhill Marathon, including start temperature, humidity, wind, race day temperatures, PR score, and course score.

Weather Averages for Last 11 Years

Race day snapshot

Partially cloudy

Most common race morning weather across the last 11 years.

Start Line Conditions

Start Temp 57°F 14°C

Start Humidity 87% Humidity

Wind SSW 2 mph

Race day high 79°F 26°C

Race day low 54°F 12°C

PR Score 102.49 Weather-influenced race day scoring

Course Score 104.63 Course-only Score

Race Day Weather by Year

Most recent years appear first so you can quickly compare start conditions, temperatures, wind, and scores across different editions of the race.

July 26, 2026

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 52°F 11°C

Start Humidity 92% Humidity

Wind W 1 mph Wind

Race day high 63°F 17°C

Race day low 52°F 11°C

PR Score 100.64 Normal score 100.30

Course Score 101.04 Course-only Score

Boston Qualifying Cut-off Time Prediction Contest